URGENT! How are the steps of adding rational expressions similar to solving rational equations? How are they different?

How do you divide 9/4 divided by 10/3

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

What is the prime factorization of 23 ?me with this question